grep:文本过滤器，
grep "pattern" input_file ....
sed: 流编辑器；
sed "command/PATTERD/"
awk:报告生成器。能够将输入的信息格式化之后显示；包括nawk版本，gawk版本
用法：
awk [option] ‘script‘ file1 file2, ...
awk [option] ‘PATTERN {action}‘ file1, file2. ...
print, printf
1 [email protected]07:~# echo "this is a test" >>test.txt
2 [email protected]07:~# awk ‘{print $0}‘ test.txt
3 this is a test
4 [email protected]07:~# awk ‘{print $1}‘ test.txt
5 this
6 [email protected]07:~# awk ‘{print $2}‘ test.txt
7 is
8 [email protected]07:~# awk ‘{print $1$2}‘ test.txt
9 thisis
10 [email protected]07:~# awk ‘BEGIN{OFS="#"}{print $1,$2}‘ test.txt
11 this#is
12 [email protected]07:~# awk ‘{print $1,$2}‘ test.txt
13 this is
14 [email protected]07:~# awk ‘BEGIN{OFS=":"}{print $1, $2, $3, $4}‘ test.txt
15 this:is:a:test
16 [email protected]07:~# awk ‘BEGIN{OFS=":"}{print $1, $2, "AAAAAAA",$3, $4}‘ test.txt
17 this:is:AAAAAAA:a:test
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时间： 2024-10-23 05:26:08